Chart Beat

This Week in Billboard Chart History: In 2010, Kesha Clocked the First No. 1 of a New Decade

Kevork Djansezian/Getty Images for DCP

Ke$ha performs onstage during the 2010 American Music Awards held at Nokia Theatre L.A. Live on Nov. 21, 2010 in Los Angeles.

"TiK ToK" began a nine-week Hot 100 reign. Plus, remembering feats by Elton John, Madonna & Green Day.

Your weekly recap celebrating significant milestones from more than seven decades of Billboard chart history.

Jan. 1
Happy New Year's Day!

Jan. 2, 2010
With her first single, Kesha clocked her first Billboard Hot 100 No. 1 – and the first No. 1 of the 2010s – with "TiK ToK."

Jan. 3, 1976
The Bay City Rollers skated to No. 1 on the Billboard Hot 100 with their debut chart entry, the bubblegum pop/dance hit "Saturday Night." Despite their name, they weren't from Bay City, Michigan, but Edinburgh, Scotland. They got their name by throwing a dart at a map of the U.S., which landed guess where …

Jan. 4, 1975
Elton John scored his third of nine Billboard Hot 100 No. 1s with "Lucy in the Sky With Diamonds." Originally on The Beatles' iconic 1967 album Sgt. Pepper's Lonely Hearts Club Band, the song became a Hot 100 leader thanks in part to John Lennon's involvement (backing vocals and guitar). The song continued a showcase of the pair's combined talents, as, in 1974, the two had teamed for Lennon's No. 1 "Whatever Gets You Thru the Night."

Jan. 5, 1991
MTV famously refused to show the song's racy video, but that didn't hurt its popularity. In fact, it fueled its fire, as "Justify My Love" became Madonna's ninth Billboard Hot 100 No. 1 (of 12 total).

Jan. 6, 1979
Bee Gees earned their seventh of nine Billboard Hot 100 No. 1s, ballad "Too Much Heaven." The trio tallied all nine leaders in the '70s, the most of any act that decade.

Jan. 7, 1995
Green Day crowned the Alternative Songs chart for a third time with "When I Come Around." The trio has added eight more No. 1s since.